code: def __init__(self):
      self.targets = np.tile(["1", "2", "3", "3", "3", "4"], 10)
  
file_path: pykale/tests/loaddata/test_sampler.py
imports: import itertools
  from collections import Counter
  import numpy
  from kale.loaddata.sampler import BalancedBatchSampler, ReweightedBatchSampler
label_desc: Use image node_id 1 to create a new MyDataset object  with example: obj = MyDataset()